Fastener-inserting mechanism



April 3, 1951 A. c. KULIK FASTENER INSERTING MECHANISM 4 Sheets-Sheet 1 Filed June 11, 1949 lfnven for: cfl/phonse C. Ku lk Aprii 3, 1951 A. c. KULIK FASTENER INSERTING MECHANISM 4 Sheets-Sheet 2 Filed June 11, 1949 nven for: .fl/p/wnse C. Ku/ik A. C. KULIK FASTENER INSERTING MECHANISM April 3, 1951 4 Sheets-Sheet 3 Filed June ll, 1949 [nven for": fl/p/vonse C. Ku/M' April 3, 1951 A. c. KULIK 2,547,919 v FASTENER INSERTING MECHANISM Filed. June 11, 1949 4 Sheets-Sheet 4 Patented Apr. 3, 1951 FASTENER-INSERTIN G MECHANISM Alphonse C. Kulik, Ipswich, Mass, assignor to United Shoe Machinery Corporation, Flemington, N. J., a corporation of. New Jersey Application June 11, 1949, Serial No. 98,547

8 Claims.

This invention relates to machines for inserting fasteners, and particularly to improvements in fastener-inserting mechanism of the type' disclosed in United States Letters Patent No. 2,415,410, granted February 11, 1947, on an application filed in the name of Benjamin B. Blanchard, and which is therein illustrated as applied to a lasting machine of the kind shown in United States Letters Patent No. 1,815,295, granted July 21, 1931, on an application filed in the name of George Goddu. It will be understood, however, that features of this invention are not limited to use in fastener-inserting mechanism or lasting machines of the exact mechanical construction shown in the aforementioned patents.

In the fastener-inserting mechanism disclosed in the Blanchard patent, the fastener, consisting of a staple formed from a piece of wire, is driven through the overlayed marginal portion of a shoe upper and into a sole member by means of a driver and, as the staple is thus driven, its legs are progressively curved, or bent, within the substance of the work by means of a staple deflector which had been caused to enter the work prior to the insertion of the staple. After the staple has been driven and before the fastener-inserting mechanism is moved away from a position in engagement with the overlasted marginal portion of the upper, which has just been secured to the sole member, the staple deflector is withdrawn from the work. As is explained in the Blanchard patent, the driver and deflector are operated in time relation from a common actuating member and by means of mechanism including a latch which, at the proper point in the operating cycle, is tripped from engagement with a latch plate to permit. the intermediate withdrawal of the deflector through the action of a spring. While the aforementioned mechanism operates in a satisfactory manner to effect entry and withdrawal of the deflector, as above described, it has sometimes been found that there is a slight tendency for the deflector to bounce, or vibrate, once or twice, because of the impact of the latch on the latch plate. When such action occurs, a considerable portion of the energy which would otherwise be utilized to effect insertion of the deflector into the work is dissipated, with the result that, instead of penetrating the overlasted upper materials, the deflector may displace the shoe downwardly. Now, when the driver is operated, the staple will be driven above the work and its crossbar will not be embedded in the upper material. Also, dur= ing such bouncing of the deflector, the latch may be accidentally disengaged with the result that the deflector is withdrawn before the staple is driven and the legs of the staple are not curved by the deflector.

It is an object of this invention to provide improved mechanism for operating the deflector of a fastener-inserting machine of the above type which is characterized by a more definite and positive control over the movements of the defiector when the same is being caused to enter the work. For the accomplishment of this purpose, in the herein illustrated fastener-inserting mechanism the deflector is operated, from the common actuating member, by means of mechanism including members arranged to form a toggle which, when straightened, provides a positive drive connection for eflecting movement of the deflector into the work and, when broken, will permit withdrawal of the deflector by means of a spring. Conveniently, the toggle may be broken by means that is actuated by the common actuating member in generally the same manner as in the aforementioned Blanchard patent.

Another object of this invention is to provide improved means for supporting and adjusting the deflector so that it may be shifted, relatively to the driver, to vary the curvature of the staple legs. Preferably, and in the herein illustrated machine, adjusting movements of the deflector take place along a rectilinear path which is perpendicular to the operating surfaces of the deflector. With this arrangement, adjustment of the deflector toward or away from the driver, for the purpose of changing the curvature of the staple legs, may be effected without altering the angular relationship between the deflector and the bottom of the shoe. Also, the improved means for supporting and adjusting the deflector is adapted to facilitate the removal and installation of the deflector.

With the above and other objects and features in view, the invention will now be described in connection with the following detailed description of a preferred embodiment thereof, illustrated in the accompanying drawings, and will be pointed out in the claims.

In the drawings,

Fig. 1 is a view in side elevation of a portion of a machine embodying the features of this invention;

Fig. 2 is a view similar to that of Fig. 1 but showing the operating elements in different positions;

Figs. 3 and 4 are views in perspective of one a of the component mechanisms of the machine shown in Fig. 1 with certain parts broken away, or omitted, and others shown in section, and

Fig. 5 is a view in side elevation of one of the parts of the machine.

Referring to the drawings, the lasting machine and fastener-inserting mechanism therein illustrated are, with the exceptions to be noted below, similar to those shown respectively in the aforementioned patents. Hence, the lasting machine comprises a gripper, having jaws Ill, for tensioning the upper A of a shoe over a last B, carrying a sole member C, and an overlaying member forming part of a fastener-inserting mechanism for laying the lasting margin of the upper in over, and for securing it to, the sole member by means of staples D. These elements operate in the same general manner as the corresponding parts of the machine disclosed in the Goddu patent and the usual edge gage l2 and shoe-bottom rest i i are provided.

As in the machine of the Blanchard patent, the upper-fastening mechanism, including means for forming staples above the line of drive and for transferring them into alinement with the staple driver, is for the most part movable bodily toward and from the work piece in directions inclined to the bottom face of the sole member C and the movement toward the work piece is utilized to lay the marginal iertion of the upper inwardly over the insole into position to be fastened. Secured to the head of the machine is a supporting member i6 (Figs. 1 and 2) provided with a forwardly and downwardly inclined guide-way for a slide 18, this slide having mounted thereon the staple transferring, driving and defleeting mechanisms and a portion of the staple forming mechanism. For moving the slide i8 along its guideway toward and from the work piece, the slide carries a cam roll 28 engaging a cam groove in a cam disk (not shown) mounted on a cam shaft (not shown) of the machine.

The staple is formed from a piece of wire which is the front end portion of a wire strand) after this piece of wire has been fed into the staple forming mechanism by wire feeding mechanism (not shown), and severed from the wire strand by wire severing mechanism (not shown). The wire severing, staple forming and staple transferring mechanisms with which the present machine is provided are the same as the corresponding mechanisms of the machine disclosed in the above mentioned Goddu patent. mechanisms in part are mounted on a bracket 2?.- (Figs. 1 2) integral with the front portion of the supporting member i6 and in part are carried by a member 2"! mounted on a bracket secured to the lower front end portion of the slide i8 by screws 25. The wire is advanced by the wire feeding mechanism through a flexible conduit 28 (Fig. 2) to a wire nozzle comprising blocks 35 secured by a screw 32 on an upwardly extending part of the member 27. The wire is fed through an outside staple former (not shown) supported on the bracket 22 on which is also provided a severing knife (not shown). After the wire has been fed through the outside staple former, the slide it is caused to move downwardly and forwardly in the machine toward the shoe presented to the machine with the result that the front end portion of the wire strand is severed. An inside staple former (not shown) mounted on the member 2'! engages, as a result of the forward movement of the slide it, the severed piece ofwire and pushes These it into the outside former to form a staple. Thereafter, the staple transferring mechanism becomes active to move the formed staple into staple driving position. The staple is moved by a transferring member 35 (Fig. 1) which is mounted for movement heightwise of the machine in the slide l5 and which is actuated by a cam operated bar 35. The staple when moved into driving position is tilted by the transferring member 3 and lowered into a throat which, in construction and function, is like the throat or nozzle of the machine of the above-mentioned Goddu patent. The throat comprises plates 38 (Figs. 1 and 2) secured in opposed relation by screws til to plates 52. The plates 52 are provided at their upper ends with flan es it which are fastened by screws it to the member 2? on the slide IS. The plates 38 are shaped to extend inwardly under the lower edges of the plates 52 and to provide a guideway for a staple driver, to be described, which is T-shaped in cross section.

The staple driving mechanism comprises a driver 56 (Figs. 1 and 2), already mentioned,

which is reciprocated in the guideway formed by the plates 38 by mechanism to be described. The driver 56 extends into and is movable with relation to a casing 58 (Figs. 1 and 2) that contains a driver clamping mechanism and a part of the driver actuating mechanism. The casing 58 is secured by screw bolts as to a forward extension (52 of the slide E3, the casing 58 and driver thus participating in the movements of the slide it. The lower end of the casing 58 is provided with a rearward extension 64 engaging a notch provided in the plates 33 and 2 to give additional support to the casing 58. Moreover, the extension 64 has parallel flanges {55 engaging the outsides of the plates 32. The driver 56 extends into a substantially rectangular block 88 which has a sliding lit in the casing 58 and is provided with a bore shaped to accommodate the driver (Fig. 1). The block 68 is recessed to admit a clamping screw it which serves to secure the driver 5% to the block E3. The block 63- is also provided with cylindrical recesses forming a socket in which is received a cylindrical block 72 having a heightwise extending groove which is engaged by the lower end of a small arm M extending through an aperture into the casing 58 and being adjustably secured to a driver opera"- ing lever it. The driver 56 thus is fulcrumed on the arm i l. The driver operating lever '16 is rotatably mounted on a shaft i8 (Figs. 1 and 2) extending through the forward extension 62 of the slide I8 and secured against rotation. More specifically, the driver operating lever i6 is mounted on a sleeve 89 on the shaft 15.

To rock the driver operating lever it about the shaft 18, thereby to reciprocate the driver 55, there is provided an operating member in the form of a bell crank lever 92 fulcrumed on a shaft 94 mounted in the slide it. The bell crank lever 92 has a forwardly extending arm carrying a cam roll 96 which engages a cam track 98 provided in the driver operating lever TE. Downward movement of the cam roll 96 in the cam track 98 causes a swinging movement of the lever 16 in a counterclockwise direction as viewed in Fig. l,'

as a result of which the driver 56 is retracted. On the other hand, upward movement of the cam roll 96 causes a rotation of the lever It in a clockwise direction, as a result of which the driver 56 is moved toward the shoe to insert a staple therein. The cam track 98 is so shaped that at the beginning of the upward movement of theroll 96 therein there is a short dwell in the movement of the lever it, for a purpose to be described. The bell cranklever is spring operated to impart to the driver 55 its driving stroke. To this end there is mounted on the hub portion ital oi the bell crank lever 92 a torsion spring its one end of which engages a lug I55. on a downwardly extending arm 3% of bell crank lever 52 and the other end of which engages a portion of the slide IS.

As in the machine of the above mentioned Goddu patent the slide it, afterhaving moved downwardly and forwardly and after the driver has been operated, is retracted with the driver in its lowermost position. During the retraction the downwardly extending arm Ids of the bell crank lever 92 is caused to become locked. To this end the arm it? is provided with a latch plate L38 which is engaged by a latch IIG pivotally secured on a cam operated lever H2 rotatably mounted on the machine frame, the latch IIO being biased by a spring i I i which tends to swing the latch Iid about its pivot into latching position. After the latch Ilil has engaged the latch plate I68 and when the slide is again advanced downwardly toward the shoe bottom, the bell crank lever 92 due to its latching engagement with the lever IE2, is rotated in a clockwise direction (Fig. 1), th reby partially loading the spring Hi2.

After the slide it has arrived in its forward operative position a trip screw Iii secured in a lug of the slide I8, been moved into the immediate vicinity of an upwardly extending arm IIE of the latch iiii. However, the latch IIii is not tripped to free the bell crank lever 92 by the screw i it pushing against the arm I I8 of the latch I It but rather the lever H2 which carries the latch lid is operated by its cam (not shown) to complete the loading of spring Hi2 and to cause the arm lit to abut the screw HE, thereby tripping the latch iii and releasing the bell crank lever 92 to the force of its spring E2. The reason for this arrangement is to time the operation of the driver to occur somewhat after the slide l8 has arrived in. its operative position. Rotation of the bell crank lever 92 in a clockwise direction, as viewed in 1, thereby loading the spring we, as above described, results in a downward movement of the roll 95 in the cam track 93 in the lever so that the driver 56 is withi drawn. Tripping the latch it?) causes a quick upward movement of the cam roll 96 as a result or which the driver is propelled downward to drive the staple into the work with the bar of the staple parallel to the sole edge.

To cause the staple, when being driven, to follow a curved path in the work so that the staple curls back toward the surface of the sole member 0 whence was driven, without penetrating the entire thickness of the sole member, the staple legs are progressively bent or deflected during the driving operation. To this end there is provided a deflector I29 (Figs. l comprising a bifurcated awl-like member which is arranged to enter the work, that is to say to pierce the overlasted marginal portion of the upper and to penetrate part way into the sole member C, as illustrated in Fig. 2 of the drawings. The deflector I29 is caused to enter the work at a point opposite the outlet end of the throat the staple emerges when being driven by the driver 5%. The two prongs I22 of the deflector i2il have cylindrically shaped grooves I23, as illustrated in Figs. 3 and 4, which are engaged by the staple legs after the latter have entered the work. The grooves serve to curve or bend the staple legs laterally of the crossbar of the staple so as to make the staple curl away from the edge of the sole member C and back toward the surface of the work whence the staple entered (see Fig. 2). In the herein illustrated machine, the deflector IZE is mounted to move heightwise of the machine into and out of engagement with the work in a direction that is inclined to the work surface, whereas the driver 55 moves in a direction inclined at an acute angle toward and from the work surface, the driver when on its operative stroke moving inwardly of the machine and outwardly of the bottom of the shoe toward the adjacent edg of the sole member and the deflector moving outwardly of the machine and inwardly of the shoe bottom. Moreover, the deflector I20, as will be described, also is mounted to move with the slide i8.

Turning now to the improved means for supporting and adjusting the deflector, the two prongs iii? of the deflector are formed integrally with a pair of guide flanges I2 3, I2 3 and a cylindrical stem Hit. This stem is slidably supported in a bore I38 formed in a deflector-carrying block, or guiding member, H32, Figs. 3 and 4. The block E32 has a pair of flanges i3I, I3I which *rooves Ml, Mil, formed in portions of the bracket its, and a pair of downwardly extending ribs E33, its, which are engaged by the guide flanges iE l, use on the deflector stem I26. As will be apparent, the ribs I33 and guide flanges I2 3 provide a very positive means for supporting the deflector the thrust of the staple, when the staple is driven, and also prevent any tendency 1 for the deflector to rotate.

Also, the deflectorcarrying block I32 is very firmly supported on the long bearing surfaces provided by the flanges I3I.

The bracket M8 is secured to the bracket 24 for adjust sent in two directions at right angles in the following manner. The member 21, which, as explained above, carries parts of the staple-forming and transferring mechanisms, is provided with grooves E53, 253 which extend at right angles to each other and the brackets 2 and it have tongues its that fit into these grooves, Fig. 3. Screws its pass through oversized holes I5I, formed in the bracket 24 and the member 2?, and arethreaded into the bracket I48, Fig. 1, while a single screw Mgr; passes through a similar clearance hole in the bracket 2% and is threaded into the member 27. As will be pointed out below, this arrangement permits independent adjustment of the member 2? and the bracket Hi8. Referring particularly to Figs. 1 and 2, it will be seen that the deflector is mounted for movement toward and away from the work in a path that is inclined downwardly and outwardly of the machine. Hence, when the deflector is caused to enter the work, e. g., the lasting margin of the upper material A, it will have a tendency to urge the lasting margin inwardly over the sole member thus additionally tensioning the upper materials.

On a rearwardly extending part of the block I32 there is a pin I82 which enters a slot 55 cut in an arm M3, Fig. l. This armis pinned to one end of a shaft 5%, journaled in the bracket I48. Secured to the opposite end of this shaft is a handle his which carries a spring-pressed detent I52, Figs. i and 5. The slot i i i is eccentric to the axis of the shaft Hit so that when this shaft is rotated by the handle E59 the block E32 will be shifted, and the deflector adjusted, back or forth in the bracket M8 along a rectilinear path de-- fined by the grooves Edi, see arrow Fig. 4. How-- ever, when the deflector is thus adjusted, neither the direction of movement of the deflector, relatively to the shoe bottom, when it is inserted in the work, or the angular relationship between the grooves I23, I23 in the deflector and the direction of movement or" the driver 55 will be altered. Hence, the curvature of the staple legs may be Varied without disturbing the action of the deflector in any respect. For holding the handle Iii-t in different positions, it is provided with a detent I52 adapted to engage either a notch I53, formed in a quadrant arm I56, or a stop I54, adjustably secured to the quadrant arm. As will be apparent from Fig. 4, which is an exploded view, and Fig. 5, when the parts are assembled this quadrant arm is secured to the bracket M3 by means of a screw I57.

The improved mechanism for moving the defiector I28 in a heightwise direction and at an angle to the bottom face of the sole member C, into and out of the work, will now be described. snugly fitted in a bore in the upper end of the stem I28 of the deflector is a pin I68 which is provided with a slot ed head I6'I and two fiat surfaces I69, I59, Figs. 3 and 4. The block I32 is slabbed off at its upper end and is embraced by the bifurcated end of an arm I'I2, a portion F53 of which is provided with a slot I10 adapted to fit over the flattened surfaces I39, I69 on the pin I68. One end of this slot is enlarged at ill to a size somewhat bigger than the pin I68 for the following purpose. The eccentric slot IE4 is provided with an axially extending portion.

I 55, When the shaft M6 is rotated to a position where the pin 142 is in line with this portion of slot I54, the block I32 may be slid to the left, Fig. 3, until pin I68 is in line with the enlarged portion Iii of slot I'ifi. Now the pin I68 may be withdrawn and the deflector removed. The arm I'I2 is rotatably mounted on shaft I'M, journaled in the bracket I42, and outside of this bracket, a second arm I'IIl, secured tothe arm I'I'Z by means of a web I75, is also journaled on this shaft. When the arm I78 is oscillated, the deflector I26 will be moved up and down in a manner that will be apparent from looking at 1 and 2.

For thus oscillating the arm H0, the following mechanism is provided. A link We connects the arm I78 to the lower end of another arm I85 which is journalzd on the shaft I0, Figs. 1 and 2. Also journaled on this shaft is a deflector-operating lever IE I. A coil. spring I32, which engages a pin I83 on the arm I89 and a pin I85 on the lever its, biases the arm I821 in a clockwise direction around the axis of shaft is and so as to elevate the deflector. The operating lever I8 3 is formed with a cam track I35 which engaged by a cam roll I28 carried by the bell-crani lever 32 and rotatable on the same axis as that of cam roll 95. The lever IB S is connected to the arm I88 in the following manner. A pair of toggle links Ida nd I92 are connected together by a pin [SI and are pivoted respectively to the arm I89 and the lever 1% by means of pins i533 and I535. The link I92 extends upwardly beyond the lever I8 5 at I9! and this extension carries a pin I99 which is embraced by the end of an arm I96 forming part of bell-crank lever 2%. The bellcrank lever 2GB is pivoted on a portion of the lever I8? by means of a pin Edi, and a tail portion of this lever is in line with an extension 23 3 of he cam. roll I88, a stop pin 203 being provided to limit movement of the bell-crank lever 230. A coil spring 286 is wrapped around the pin ass and arranged to bear on the lever IS i and the link I92 in such a manner as to tend to straighten the toggle formed by the links I90 and I92, and an adjustable stop screw 208 is threaded into a portion of the slide It in a position to be engaged by an extension IBI of the arm Hit.

a The operation of the herein illustrated machine to sever a length of wire, formit into a staple, transfer the staple down into alinenient with the driver, and drive the staple, is the same as that of the machine disclosed in the Goddu patent, as is also the action of the gripper jaws It, IQ to seize the upper, pull it heightwise oi the last, and draw it inwardly over the sole memher, and will not be described. However, as will be pointed out below, the gripper jaws are moved inwardly over the shoe bottom by the throat member, instead of by a spring as in the Goddu patent. Likewise, the overall action of the mechanism for operating the driver and the deflector, in proper time relation, is similar to that described in detail in the Blanchard patent and need not be repeated. However, with the improved deflector-operating mechanism described above, a somewhat dilferent action is obtained. Referring to Figs. 1 and 2, the latter shows the positions or" the various parts after the deflector has been caused to enter the work and just after the staple has been driven. When being rotated, in a counterclockwise direction by spring I02 and to the position shown in Fig. 1, the lever 92 first effects angular movement of the deflectoroperating lever Hi l (cam roll Its and cam track I) in a counterclockwise direction, and inasmuch as the toggle formed by the links I55, I92 is at this time straightened, the arm I80 is swung in the direction to effect movement of the deflector I28, through the link HQ and arms I18 and I12, downwardly and into the work. Next, the driver arm '15 is actuated (cam roll 96 and cam track 98) to effect operation of the driver to drive the staple, the cam track 88 being shaped so as to delay such action of the driver until after the deflector has been operated, and the parts eventually reach the positions shown in Fig.

Upon a slight additional movement of the lever 92, the extension 204 on the cam roll I88 strikes the bell-crank lever 200 and rotates it in a direction to swing the link I in a clockwise direction, thus breaking the toggle formed by links I99, I52 and permitting the spring I82 to move the arm I80 in a direction to effect withdrawal of the deflector from the work, Fig. 1, such movement of the arm I80 being limited by the engagement of extension I8| with the stop screw 2&8. During such additional movement of the lever 92, the cam rolls 0% and I88 travel along dwell portions in cams 93 and I86 so that no movement of the driver or deflector occurs. The slide it is now withdrawn to complete the operating cycle. When the slide I8 is again moved forwardly, to the right, Figs. 1 and 2, latch IIQ catches the plate I 03 and causes the member 92 to be rotated in a clockwise direction and the spring I02 to be cooked partially, as above explained. As the member 32 is thus rotated reversely, the driver 56 is retracted and the deflector-operating lever I84 swung in a clockwise direction. The extension 204 on the cam roll I88 now moves away from the bell-crank lever 200 and, since the arm I80 is held against rotation in this direction by the stop 208, the toggle formed by the links I 98 and I92 will be straightened, assisted by the action of the spring 206, thus restoring the parts for the nextoperation of the deflector.

With the foregoing arrangement, motion of the lever N34 is transmitted to the arm I80, and

thus to the deflector I26, by means of the toggle I50, E92. Inasmuch as this toggle provides a positive drive connection, it is impossible for the deflector to bounce, or vibrate, as it is being operated. Accordingly, the deflector will certainly be inserted into the work and the work held in the proper position relatively to the driver and deflector when the staple is driven, thus assuring that the legs of the staple will be properly curved within, and the crossbar of the staple embedded in, the work. However, upon the breaking of the toggle, in the manner described above, the deflector will be immediately withdrawn by means of the spring I82.

Referring again to the improved deflector supporting and adjusting mechanism shown particularly in Figs. 3 and 4, the relatively long bearing surfaces afiorded by the flanges l3l and grooves Isl, provide a very rigid and unyielding support for the deflector-carrying block I32 while, at the same time, permitting movement of this block for adjusting the position of the deflector to vary the curvature of the staple legs by means of the hand lever I50. As has been already suggested above, such adjusting movements of the block 832 are effected along a rectilinear path at right angles to the operating surfaces of the deflector so that neither the angular relationship between the deflector and the driver nor between the deflector and the Work is disturbed. Also, if it should become necessary to replace a deflector for any reason, removal of the old deflector and installation of a new one can be eifected readily in a few moments, and without the need for any special tools, by merely moving the handle IE to a position in which pin M2 is in line with the axially extending por tion M of slot I4 4. The block I32 may then be moved back to a position where pin 5'68 can be removed through hole Hi.

When the machine is first assembled, or at any later time, the member 2'! and the bracket MS may be very readily adjusted for the purposes of lining up the staple-transferring mechanism with the driver and of positioning the deflector so to line up its grooves with the legs of the staple, in the following manner. First, the screw 5 39a is partially tightened, the member 27 shifted back and forth until the transfer mechanism is proper position, and finally the screw M9 is fully tightened. Now the same procedure may be followed with the screws M9 and the bracket l :38 without, however. disturbing the previously made adjustment of the member 21. As suggested above, the deflector is arranged to move in a path that is inclined downwardly and outwardly of the machine and this arrangement is provided for the following reason. After the upper materials have been tensioned and drawn inwardly over the sole member, the deflector is caused to enter the lasting margin and, since the direction of movement of the deflector is in clined to the sole member, the deflector, in penetrating the upper materials, tends to impart a slight additional inward movement to the lasting margin, thus further tensioning the upper materials. With the deflector thus mounted for movement along a path which is inclined to the work, the driver casing 58 may be arranged in the location shown in Figs. 1 and 2 and at a rather steep angle to the work. Such location of the driver casing affords a sufiicient space, between the casing and the work, to receive the gripper jaws l0, H with these jaws directly in line with the deflector I23 and the throat, formed by plates 38, 35. With the gripper jaws so l0- cated, lasting of a shoe may proceed in either direction relatively to these elements. Also, the movement of the gripper jaws in a direction to draw the lasting margin of the upper materials A inwardly over the sole member C may now be conveniently effected by the action of the throat member which will push the jaws in this direction as it is moved to the position shown in Figs. 1 and 2. Hence, the usual overdraw spring, provided in the machine shown in the Goddu patent, may be omitted if desired.

Having described the invention, what I claim as new and desire to secure by Letters Patent of the United States is:

l. A fastener-inserting mechanism having, in combination, a work-entering deflector and a staple driver, driver-operating means and deflector-operating means, and positive drive connections between said driver-operating means and the deflector-operating means including a pair of members forming a toggle, said toggle being operative, when straightened, to cause the deflector to enter the work on actuation of the driver-operating means.

2. A fastener-inserting mechanism having, in combination, a work-entering staple deflector and a staple driver, driver-operating means and deflector-operating means, positive drive connections between said driver-operating means and the deflector-operating means including a pair of members forming a toggle, said toggle being operative, when straightened, to cause the deflector to enter the work on actuation of the driver-operating means, means tending to withdraw the deflector from the work, and. automati-- cally controlled means for breaking the toggle immediately after the driving of a staple to permit the deflector to be withdrawn from the work by said last-mentioned means.

3. A fastener-inserting mechanism having, in

combination, a work-entering staple deflector and a staple driver, driver-operating means and de hector-operating means, positive drive connections between said driver-operating means and the deflector-operating means including members forming a toggle, said toggle being operative, when straightened, to cause the deflector to enter the work on actuation of the driver-operating means, yielding means tending to straighten the toggle, spring means tending to withdraw the deflector from the work, and means controlled by the driver-operating means for breaking the toggle immediately after the driving of a staple to permit said spring means to withdraw the deflector from the work.

(i. A fastener-inserting mechanism having, combination, a work-entering staple deflector and staple driver, driver-operating means and de- Elector-operating means, positive drive connections between said driver-operating means and deflector-operating means including a pair of links forming a toggle, said toggle being operative, when straightened, to cause the deflector to enter the work on actuation of the driver operating means, yielding means tending to straia .lten the toggle, spring means tending to withdraw the deflector from the work, and means controlled by the driver-operating means for breal; the toggle immediately after the driving of a 1 l staple to permit said spring means .to withdraw the deflector from the work.

5. A fastener-inserting mechanism having, in combination, a deflector adapted to enter the work and to curve a fastening progressively in the driving operation and a fastening-inserting driver, a slide for supporting the deflector and the driver in operative relation, a deflector-guiding member in which said deflector is mounted for movement toward and away from an operative position within the work, and means associated with said slide for supporting said deflector-guiding member for movement along a rectilinear path, relatively to said driver, for varying the curvature imparted to the fastening by the deflector.

6. A fastener-inserting mechanism having, in combination, a deflector adapted to enter the work and curve a fastening progressively in the driving operation and a fastening-inserting driver, a slide for supporting the deflector and the driver in operative relation, a deflector-guiding member in which said deflector is mounted for movement toward and away from an operative position within the work, and means associated with said slide and formed with guideways for supporting said deflector-guiding member for movement along a rectilinear path, relatively to said driver, for varying the curvature imparted to the fastening by the deflector.

. 7. A fastener-inserting mechanism having, in combination, a deflector adapted to enter the work and to curve a fastening progressivelyin the driving operation and a fastening-inserting driver, a slide for supporting the deflector and driver in operative relation, a deflector-guiding member in which said deflector is mounted for movement toward and away from an operative position within the work, means associated with said slide for supporting said deflector-guiding member for movement along a rectilinear path, relatively to said driver, for varying the curvature imparted to the fastening by the deflector, and means for effecting such movements of the deflector-guiding member along said path.

8. A fastener-inserting mechanism having, in combination, a deflector adapted to enter the work and to curve a fastening progressively in the driving operation and a fastening-inserting driver, a slide for supporting the deflector and driver in operative relation, a deflector-guiding member in. which said deflector is mounted for movement toward and away from an operative position within the work, means associated with said slide and formed with guideways for supporting said deflector-guiding member for movement along a rectilinear path, relatively to said driver, for varying the curvature imparted to the fastening by the deflector, and means for effecting such movements of the deflector-guiding member along said path.

ALPH-ONSE C. KULIK.

No references cited. 

